A primary concern with composite repair patches is the potential degradation of load transfer capabilities due to aging and environmental effects. The development of low profile, distributed, embeddable, real-time, optical fiber sensors capable of detecting the onset of patch delamination on repaired regions of the aircraft would eliminate a significant portion of the related maintenance costs as well as improve confidence levels in the technology. The presented sensing system is comprised of optical fiber long period gratings (LPGs) for chemical measurement and Bragg gratings for strain measurement. The sensors can be multiplexed together to monitor the structural health of the patch system and status of any remaining damage in the parent structure. The LPG sensors operate based on specially designed sensing coatings which cause a measurable change in the refractive index "seen" by the LPG in the presence of target molecules. In this configuration, LPGs can be used to detect moisture infiltration and other chemical changes within a localized environment. Complementary to the long period grating, Bragg grating strain sensors can be fabricated on the same optical fiber to measure load transfer and composite delamination in patches used to repair cracks that occur in aging aircraft.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Optical-fiber-based adhesive bondline monitoring system for composite patch systems


    Beteiligte:
    Elster, J. (Autor:in) / Trego, A. (Autor:in) / Dante, J. (Autor:in) / Jones, M. (Autor:in) / Avram, J. (Autor:in)


    Erscheinungsdatum :

    2001


    Format / Umfang :

    8 Seiten, 9 Quellen




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    AN ADHESIVE BONDLINE SPACER CLIP

    SCHMIDT MARCUS / VAN DER PUTTEN ZEF | Europäisches Patentamt | 2021

    Freier Zugriff

    Effect of Bondline Thickness on Mode I Fracture in Adhesive Joints

    Qian, H. / Sun, C. / American Institute of Aeronautics and Astronautics | British Library Conference Proceedings | 2008


    Bondline embedded current sensor

    ANWAY CAROL E / ROBB ANDREW M / IHN JEONG-BEOM | Europäisches Patentamt | 2016

    Freier Zugriff


    Cryotank skin/stringer bondline analysis

    Nguyen, Bao | Tema Archiv | 1999